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Finding the Fourth Proportional to 78,718.96, 118,047.78 and 26,114.32

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Solution

The fourth proportional to 78,718.96, 118,047.78 and 26,114.32 is: 39,161.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,718.96 : 118,047.78 = 26,114.32 : x
  2. Step 2: Convert to fraction form
    78,718.96/118,047.78 = 26,114.32/x
  3. Step 3: Cross multiply
    78,718.96x = 118,047.78 × 26,114.32
  4. Step 4: Simplify right side
    78,718.96x = 3,082,737,502.21
  5. Step 5: Solve for x
    x = 3,082,737,502.21/78,718.96
  6. Step 6: Final answer
    x = 39,161.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.